Standing seam roof clamp

ABSTRACT

A clamp for attaching solar panel grids to standing seam roof structures. The clamp includes opposing clamp halves having inter-engageable projections and recesses. One or more fasteners engage the halves to draw them together. A first set of recesses on one clamp half receives a first set of projections on the other half. A second set of recesses on the other clamp half receives a second set of projections. When loose, the first set of projections engage the first set of recesses like a detent, while the second set of projections are spaced apart from the second set of recesses to enable the clamp to be slid down onto the vertical seam of a standing seam roof. Tightening the fasteners causes the second set of projections to deform the seam into the second set of recesses, fixing the clamp to the seam.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a divisional application of, and claims priority to, pendingU.S. non-provisional patent application Ser. No. 13/034,824, and alsoclaims priority to U.S. provisional patent application Ser. No.61/308,535, filed Feb. 26, 2010, the entirety of which applications areincorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

Embodiments of the invention generally relate to the field of mountingclamps, and more particularly to the field of mounting clamps for use insecuring solar panels to standing seam style roof applications.

2. Discussion of Related Art

Roof mounted solar panels are typically used to convert solar energy toelectrical power. In some cases, these solar panels are used to generatehot water. These devices have been utilized in these applications formany years. A typical solar panel installation is comprised of a roofmounted grid system employing one of many various types of structuralproducts including strut, angle iron and wood. The grid may be anchoredto structural elements of the building or it may be mounted to the roofsurface. Many buildings employ a standing seam type of roof constructionin which metal sheathing material overlies the roofing structure, andindividual roof panels are connected by a plurality of verticallyoriented metal “seams.”

With the recent emphasis placed upon alternative energy sources, thereis a need for a convenient clamp for use in connecting solar panel gridsto such standing seam roof structures. The clamp should enable quick andeasy attachment of solar grids to standing seam roofs. The clamp shouldalso be capable of integration into various grid designs and productalternatives.

SUMMARY OF THE INVENTION

A solar panel clamp is disclosed, comprising first and second opposingclamp portions. The first clamp portion comprises a first end and asecond end, the first end including a first set of projections and thesecond end including a second set of projections. The second clampportion comprises a first end and a second end, the first end includinga first set of recesses and the second end including a second set ofrecesses. A fastener has a first end engageable with the first clampportion and a second end engageable with the second clamp portion. Thusarranged, the fastener has a loosened configuration in which the firstset of projections are retained within the first set of recesses and thesecond set of projections are spaced apart from the second set ofrecesses. The fastener further has a tightened configuration in whichthe first and second sets of projections are receivable within the firstand second sets of recesses, respectively.

A solar panel clamp is disclosed, comprising first and second opposingclamp portions. The first clamp portion may have a first end and asecond end. The first end may include a first projection and the secondend may include a first recess. The second clamp portion may have afirst end and a second end. The first end may include a second recessand the second end may include a second projection. A fastener may beengageable with the first and second clamp portions. The fastener mayhave a loosened configuration in which the first projection is receivedwithin the second recesses and the second projection is spaced apartfrom the first recess. The fastener further may have a tightenedconfiguration in which the first projection is received within thesecond recess and the second projection is receivable within the firstrecess.

A clamp is disclosed, comprising first and second opposing clampportions. The first and second clamp portions may be engageable witheach other at first and second ends. A fastener may be engaged with thefirst and second clamp portions. The fastener may be movable from aloosened configuration, in which the first and second clamp portions areseparated by a distance at the first end and are connected a second end,to a tightened configuration in which the first and second clampportions are connected at the first end. The first and second clampportions may having corresponding projections and recesses disposed atrespective second ends for deforming a captured portion of a roof seamas the fastener is moved from the loosened configuration to thetightened configuration.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings illustrate preferred embodiments of thedisclosed method so far devised for the practical application of theprinciples thereof, and in which:

FIG. 1 is an isometric view of a typical metal standing seam roofdesign;

FIG. 2 is a an isometric view of the disclosed clamp;

FIG. 3 is a reverse isometric view of the clamp of FIG. 2;

FIG. 4 is a cross-section view of a the clamp of FIGS. 2 and 3 takenalong line 4-4 of FIG. 3;

FIG. 5 is a side view of the clamp of FIG. 2;

FIG. 6 is a top plan view of the clamp of FIG. 2;

FIG. 7 is an isometric view of a further embodiment of a clamp forengaging a standing seam roof;

FIG. 8 is a reverse isometric view of the clamp of FIG. 7;

FIG. 9 is a cross-section view of the clamp of FIG. 7 taken alone line9-9;

FIG. 10 is a partial cutaway view of the clamp of FIG. 7;

FIG. 11 is an isometric view of a further embodiment of a clamp forengaging a standing seam roof;

FIG. 12A is a reverse isometric view of the clamp of FIG. 11;

FIG. 12B is a cross-section view of an alternative embodiment of theclamp of FIG. 11, taken along line 12B-12B of FIG. 12A, showing roundedprojections; and

FIG. 13 is a side view of the clamp of FIG. 11.

DESCRIPTION OF EMBODIMENTS

A clamp design is disclosed for use in securing solar panels to standingseam roof top structures. Due to its strength-efficient design, thedisclosed clamp may be manufactured from relatively light gage aluminumor steel, and may be formed in a manner as to provide high strength inboth tension and compression to offset in-situ forces such as wind liftand snow loads. The disclosed clamp design includes features that enablethe clamp to be quickly and securely attached at one end to a roofstanding seam, and to interface with a strut or other solar panel gridmaterial at the other end. In addition, the disclosed clamp may be sizedto provide a desired “stand-off” dimension that positions the solarpanels—which are attached to the grid—a predetermined distance above theroof surface, facilitating appropriate drainage and air-flow around thepanels.

Referring to FIG. 1, a portion of a typical standing seam type roof 1 isshown. The roof 1 consists of a series of flat metal sheeting elements 2connected via a plurality of vertically oriented standing seams 4 whichextend a distance “D” above the plane of the sheeting elements 2. Whenstructures such as solar panel grids are mounted to a standing seam roof1, it is desirable to clamp the grids to the standing seams in order toavoid the need to pierce the sheeting elements 2 with fasteners such asscrews or nails.

Referring to FIGS. 2 and 3, the clamp 6 may include first and secondopposing clamp halves 8, 10 that are engageable with each other viafasteners 12 received within associated recesses 14 (FIG. 4) in each ofthe clamp halves 8, 10. The clamp 6 has a first end 16 configured toengage opposite flat sides of a standing seam 4 of a roof and to clampto the seam upon tightening of the fasteners 12. The clamp 6 has asecond end 18 that is configured to engage a grid structure (e.g., achannel member), to which a series of solar panels are mounted. Thus,arranged, the clamp 6 can be used to securely fix a solar panel grid(along with associated solar panels) to the standing roof 1 withoutpiercing the sheeting elements 2 of the roof.

As can be seen in FIGS. 2-5, the first and second clamp halves 8, 10include features that provide a keyed engagement between the halves.This keyed engagement provides for easy handling during installation,and also provides desired high strength and rigidity. The first clamphalf 8 has first and second sets of recesses 20, 22 configured toreceive first and second sets of projections 24, 26 of the second clamphalf 10. As will be explained in greater detail later, the first set ofprojections 24 are loosely received within the first set of recesses 20when the fasteners 12 are in the loosened condition (i.e., loose enoughthat the first end 16 of the clamp 6 can easily fit over an associatedstanding seam 4). Once the clamp 6 has been provisionally fit over thestanding seam 4, the fasteners can be tightened so that the first set ofprojections is pressed toward the first set of recesses. This tighteningcauses the second set of projections 26 to deform the standing seammaterial into the second set of recesses 22, thus fixing the clamp 6firmly to the seam.

It will be appreciated that although the second set of recesses 22 aresized to receive the second set of projections 26 when the clamp halves8, 10 are tightened together, in normal operation the projections serveto deform the seam material into the recesses 22. As such, theprojections 26 may not, themselves, be received by the recesses. Ofcourse, where the seam material is particularly thin or malleable, theprojections 26 may be received within the recesses 22 when the fastenersare tightened.

Referring to FIG. 4, the first clamp half 8 may comprise first andsecond segments 28, 30 that are generally parallel to a longitudinalaxis “A-A” of the clamp 6. The first and second segments are connectedvia a third segment 32 that is angled with respect to the longitudinalaxis so as to position the second segment 30 away from the second clamphalf 10 when the halves are connected. As can be seen, the second set ofrecesses 22 is disposed in the first segment 28. Further, the fastenerrecesses 14 are disposed in the second segment 30, as are the first setof recesses 20. The first clamp half 8 also has a fourth segment 34which is connected to the second segment 30 and is oriented generallyperpendicular to the longitudinal axis “A-A” of the clamp 6. This fourthsegment 34 includes a plurality of holes 36 to enable the clamp 6 toengage a solar panel grid structure (e.g., a channel member), using oneor more fasteners.

As shown in FIG. 6, the holes 36 in the fourth segment 34 of the firstclamp half 8 may be of the same size, or they may be of different sizes,for accepting fasteners, such as bolts or screws, to allow the clamp 6to be fastened to a variety of solar panel grid arrangements. The holes36 may be tapped for receiving machine screws, or they may be flat forreceiving bolts, rivets, or the like. In some embodiments, the holes 36may be square to enable them to receive carriage bolts.

Referring again to FIG. 4, the second clamp half 10 may comprise first,second, third and fourth segments 37, 38, 40, 42. The first, second andthird segments 37-40 may have a shape and size similar to, or the sameas, corresponding segments of the first clamp half 8. Thus, the firstand third segments 37, 40 are oriented generally parallel to thelongitudinal axis “A-A” of the clamp 6, and are connected via the secondsegment 38 which is angled with respect to the longitudinal axis. Thesecond set of projections 26 is disposed in the first segment, while thefastener recesses 14 are disposed in the third segment 40. The fourthsegment 42 of the second clamp half 10 is connected to the third segment40 and is oriented generally perpendicular to the longitudinal axis“A-A” of the clamp 6. The first set of projections 24 are disposed at anend of the fourth segment 42 are sized and positioned to be receivedwithin the first set of recesses 20 in the first clamp half 8.

FIGS. 2 and 3 show the clamp 6 in the assembled and fully tightenedconfiguration. That is, the fasteners 12 are tightened such that thefirst and section clamp halves 8, 10 are fixed together and the firstand second sets of projections 24, 26 are fully engaged with the firstand second sets of recesses 20, 22. These figures show the clamp 6alone, without the context of a roof seam 4. By contrast, FIG. 4 showsthe clamp 6 engaged with a portion of a roof seam 4. As shown in thisfigure, the fasteners 12 have been tightened such that the second set ofprojections 26 have deformed a portion of the roof seam 4 into thesecond set of recesses 22. As can be seen, in this embodiment theprojections themselves do not engage the recesses 22. It will beappreciated that the fasteners 12 could be tightened sufficiently toforce the projections (along with the roof seam material) into therecesses 22, but it is not necessary to do so to achieve a desired tightconnection between the clamp 6 and the roof seam 4.

As can be seen in FIGS. 2 and 3, the second set of projections 26 mayhave a rounded tip to concentrate the force applied from the fasteners12 to deform the metal of the roof seam 4 into the second set ofrecesses 22 when the clamp is tightened. It will be appreciated thatsuch a rounded configuration is not critical, and the projections couldhave a variety of shapes such as pointed, flat, stepped, and the like. Arounded surface may be desirable, however, to minimize the chance thatthe seam material will be pierced by the projections.

As previously noted, the clamp 6 includes a feature that provides keyedengagement between the clamp halves. In the illustrated embodiment, thiskeyed engagement is provided by the interaction between recesses 20 andprojections 24. The first set of projections 24 may be of any desiredshape, but in the illustrated embodiment they are rectangular and aresized to fit loosely within the first set of recesses 20. Theseprojections 24, in combination with the first set of recesses 20,function as a detent that holds the clamp halves 8, 10 together whilethe fasteners 12 are loosened to enable the first end 16 of the clamp 6to be slipped over an associated roof seam 4. This detent arrangementreduces the total amount of work required to fit-up and tighten theclamp 6 compared to previous designs.

As previously noted, the arrangement of multiple recesses 20, 22 andmultiple associated projections 24, 26 serve to align the clamp 6 andalso to provide the clamp with a desired high degree of rigidity uponinstallation. Although the illustrated embodiment shows the first andsecond sets of recesses 20, 22 formed in the first clamp half 8 and thefirst and second sets of projections 24, 26 formed in the second clamphalf 10, it will be appreciated that the configuration could be switchedsuch that the recesses are formed in the second clamp half and theprojections formed in the first clamp half. Other similar permutationsare also contemplated.

In one embodiment, the clamp 6 can be delivered to a user in thetightened condition shown in FIGS. 2 and 3. Prior to installation, theuser can back off the fasteners 12 slightly to open a gap between thesecond set of projections 26 and the second set of recesses 22 so thatthe first end 16 of the clamp 6 can be slid down onto a targeted roofseam 4. The previously described detent feature holds the clamptogether, enabling the user to engage the clamp with the roof seam usinga single hand. Subsequent tightening of the fasteners 12 serves todeform a portion of the roof seam 4 into the second recesses 22, lockingthe clamp 6 to the roof 1.

FIGS. 7-10 show another embodiment of a clamp 60 for engaging a standingseam type roof. Clamp 60 may include all of the features described inrelation to clamp 6 of FIGS. 2-6, with the exception that clamp 60 hasthree projections and three recesses for clamping to a roof seam 4 upontightening of the fasteners 66. As will be described, the positioning ofthese three projections and three recesses causes the roof seam 4 to bedeformed into a “wave” pattern when the clamp 60 is tightened onto theseam 4.

Clamp 60 includes first and second opposing clamp halves 62, 64 that areengageable with each other via fasteners 66 in the manner described inrelation to clamp 6. A first projection 68 a resides on the first clamphalf 62, while second and third projections 68 b, 68 c reside on thesecond clamp half 64. Correspondingly, the first clamp half 62 includesfirst and second recesses 70 a, 70 b that are sized and configured toreceive second and third projections 68 b, 68 c, while the second clamphalf 64 includes a third recess 70 c that is sized and configured toreceive the first projection 68 a. As can be seen, the projections 68a-c are staggered so that the first projection 68 a is positionedbetween the second and third projections 68 b, 68 c when the clamphalves 62, 64 are connected.

Thus, when the clamp halves 62, 64 are connected and tightened onto aseam 4 of a standing seam roof 1, the roof seam is deformed by theprojections 68 a-c such that a portion of the seam is received withinthe recesses 70 a-c. The resulting “wave” pattern results in ahigh-strength connection between the clamp 60 and the seam 4. As withthe previous embodiment, the projections 68 a-c may simply serve todeform the roof seam 4 into the recesses 70 a-c such that theprojections themselves are not received within the recesses. It will beappreciated that a clamp may also be provided with greater than threeprojections and recesses, as desired.

FIGS. 11-13 show a further embodiment of a clamp 160 for engaging astanding seam type roof. Clamp 160 may include some or all of thefeatures described in relation to clamps 6 and 60 of FIGS. 2-10. Clamp160 has three projections and three recesses for clamping to a roof seam4, and as described in detail in relation to clamp 60, the positioningof these projections and recesses may cause the roof seam 4 to bedeformed into a “wave” pattern when the clamp 160 is tightened onto theseam 4.

Clamp 160 includes first and second opposing clamp halves 162, 164 thatare engageable with each other via a single fastener 166 in a mannersimilar to that described in relation to clamps 6, 60. A firstprojection 168 a resides on the first clamp half 162, while second andthird projections 168 b, 168 c reside on the second clamp half 164.Correspondingly, the first clamp half 162 includes first and secondrecesses 170 a, 170 b that are sized and configured to receive thesecond and third projections 168 b, 168 c, while the second clamp half164 includes a third recess 170 c that is sized and configured toreceive the first projection 168 a. As can be seen, the projections 168a-c are staggered so that the first projection 168 a is positionedbetween the second and third projections 168 b, 168 c when the clamphalves 162, 164 are connected.

Thus, when the clamp halves 162, 164 are connected and tightened onto aseam 4 of a standing seam roof 1, the roof seam is deformed by theprojections 168 a-c such that a portion of the seam is received withinthe recesses 170 a-c. The resulting “wave” pattern results in ahigh-strength connection between the clamp 160 and the seam 4. It willalso be appreciated that a clamp may also be provided with greater thanthree projections and recesses, as desired. In one embodiment, shown inFIG. 12B, the projections 168 a-c are rounded.

The clamp 160 of FIGS. 11-13 may include one or more simplified designfeatures as compared to the previously described embodiment. Forexample, the clamp halves 162, 164 are connected using a single fastener166, as compared to the multi-fastener designs of the previousembodiments. In the illustrated embodiment, the fastener 166 is anut/bolt combination. It will be appreciated, however, that any of avariety of adjustable fasteners could also be used. In addition, keyedengagement between the clamp halves 162, 164 is provided by theinteraction between a single recess 172 and a single projection 174. Asnoted, this keyed engagement between clamp halves serves to hold thehalves 8, 10 together while the fastener 166 is loosened to enable theclamp 160 to be slipped onto an associated roof seam 4.

The clamp halves 162, 164 may each include a plurality of individualsegments 162 a-c, 164 a-d shaped and configured in a mannersubstantially similar to that of the previously described embodiments.Unlike the previous embodiments, however, a top surface of segment 162 cis positioned to be flush with a top surface of segment 164 d (priorembodiments included a cantilevered top segment 34). The resultingarrangement provides a box-like structure that enhances the strength andrigidity of the clamp 160. This strength and rigidity is furtherenhanced by the interlocking of recess portion 172 (of segment 162 c)and projection portion 174 (of segment 164 d).

Upper segment 164 d includes a hole 136 to enable the clamp 160 toengage a solar panel grid structure (e.g., a channel member) using asingle fastener. It will be appreciated that segment 164 d could includemore than one fastener hole, as desired to suit a particularapplication. In some embodiments, the hole 136 can be square to enableit to receive a carriage bolt.

As shown in FIG. 12A, the clamp 160 may also include a spring 176disposed about the shaft of the fastener 166 which connects the clamphalves 162, 164. The spring is sized to engage the inner surfaces ofclamp half segments 162 c, 164 c to bias the clamp halves apart when thefastener 166 is in the loosened condition. As will be appreciated, this“biased open” configuration enables the clamp 160 to hold its shapewhile it is being fit onto a standing seam 4, prior to tightening of thefastener 166. As will be appreciated, this arrangement facilitateseasier installation of the clamp 160. It will be appreciated thatalthough the spring 176 is illustrated as being a coil spring, any of avariety of spring types may be used to provide the desired “biased open”configuration.

As can be seen in FIGS. 11 and 12A, the clamp 160 may further include aflared insertion end that further facilitates insertion of the clamponto a targeted roof seam 4. Thus, distal ends of clamp segments 162 a,164 a may include flared sections 178, 180 that diverge in order toprovide a larger insertion gap “G” between the segments than existsbetween the flat, parallel, portions of segments 162 a, 164 a. As willbe appreciated, this increased insertion gap “G” makes it easier to feedthe roof seam 4 into the gap clamp 160 onto a roof seam 4.

The disclosed clamp 6, 60, 160 may be produced in a variety of sizesdepending upon the configuration of the roof seams and the solar panelsor solar panel grids that will attach to it, as well as the amount ofclearance desired between the panels and the roof. In one non-limitingembodiment, the clamp 6, 60, 160 may have a length “L” (see FIG. 4) asmeasured along its longitudinal axis “A-A” of about 4-inches. The clamp6, 60, 160 may have a width “W” of about 2½-inches (as measured acrossthe fourth segment 34 of the first clamp half 8), and a depth “DP” (seeFIG. 5) of about 3-inches to provide a desired connection pad forconnecting to a solar panel grid.

The disclosed clamp 6, 60, 160 may be formed from thin gauge steel(e.g., ¼-inch), bent to assume the appropriate shape and stamped toincorporate the previously described recesses and projections. The clampmay alternatively be made from other metals of appropriate mechanicalstrengths. Materials such as fiberglass, aluminum and reinforcedpolymers may also be used depending upon the needs and restrictions ofthe project.

Where the disclosed clamp 6, 60, 160 is made from steel, it may befabricated by blanking the raw material to the basic size in aconventional mechanical punch press. The pierced details (i.e., holes)may be added after forming through the use of a conventional mechanicalpunch press.

The disclosed clamp 6, 60, 160 provides a universal attachment mechanismfor anchoring a wide range of solar panel designs through the use of auniversal grid system which is attached to a standing seam roofstructure. The attachment of the clamp 6, 60, 160 to a buildingstructure is a simple process regardless of the building configurationdue to the variety of attachment points provided by the clamp. In oneembodiment relating to strut grid applications, grids can be assembledas modules and lifted into place for attachment to the clamp 6, 60, 160.This attribute provides the user with reduced labor costs for theinstallation of a typical solar grid.

The disclosed clamp can be provided in multiple manners, dependent uponlocation of the project, relationships with the Solar PanelManufacturer, Installation Contractor or end user. The clamp can beprovided individually as a component to be integrated into a design.Further, the clamp can be provided to Solar Panel Manufacturers as apreferred method of attachment of their Solar Panels. It could also beprovided as a part of a system approach including materials to fabricateand assemble an associated grid. Further, the clamp can be provided as apart of a total installation contract involving all or part of thestructural aspects of a particular project.

While the present invention has been disclosed with reference to certainembodiments, numerous modifications, alterations and changes to thedescribed embodiments are possible without departing from the spirit andscope of the invention, as defined in the appended claims. Accordingly,it is intended that the present invention not be limited to thedescribed embodiments, but that it has the full scope defined by thelanguage of the following claims, and equivalents thereof.

What is claimed is:
 1. A solar panel clamp, comprising: first and secondclamp portions; the first clamp portion comprising a first end and asecond end, the first clamp portion having a first set of recessesadjacent the first end and a second set of recesses adjacent the secondend; the second clamp portion comprising a first end and a second end,the second clamp portion having a first set of projections positionedadjacent the first and a second set of projections adjacent the secondend; a fastener engageable with the first and second clamp portions;wherein the fastener has a loosened configuration in which the first setof projections are retained within the first set of recesses and thesecond set of projections are spaced apart from the second set ofrecesses by a first distance; and wherein the fastener further has atightened configuration in which the second set of projections arepositioned closer to the second set of recesses than said firstdistance.
 2. The solar panel clamp of claim 1, comprising a springdisposed between the first and second clamp portions to bias the clampportions apart.
 3. The solar panel clamp of claim 2, the spring disposedabout a body portion of the fastener.
 4. The solar panel clamp of claim1, the second ends of the first and second clamp portions being flaredapart.
 5. The solar panel clamp of claim 1, wherein the second set ofprojections are rounded.
 6. The solar panel clamp of claim 1, one of thefirst and second clamp portions having a receiving section disposedsubstantially perpendicular to a longitudinal axis of the solar panelclamp, the receiving section having at least one hole to enable saidclamp to be connected to a solar panel grid structure using a fastener.7. The solar panel clamp of claim 1, the first clamp portion having aprojection positioned between the second set of recesses, the secondclamp portion having a recess positioned between the second set ofprojections.
 8. A solar panel clamp, comprising: first and secondopposing clamp portions; the first clamp portion comprising a first endand a second end, the first end including a plurality of firstprojections and the second end including a plurality of secondprojections; the second clamp portion comprising a first end and asecond end, the first end including a plurality of first recesses andthe second end including a plurality of second recesses; a fastenerengageable with the first and second clamp portions; the clamp having aloosened configuration in which the plurality of first projections arereceived within the plurality of first recesses and the plurality ofsecond projections are spaced apart from the plurality of secondrecesses by a first distance, the clamp further having a tightenedconfiguration in which the plurality of second projections arepositioned closer to the plurality of second recesses than said firstdistance.
 9. The solar panel clamp of claim 8, comprising a springdisposed between the first and second clamp portions to bias the clampportions apart.
 10. The solar panel clamp of claim 9, the springcomprising a coil spring disposed about the fastener.
 11. The solarpanel clamp of claim 8, wherein the plurality of second projections arerounded.
 12. The solar panel clamp of claim 8, one of the first andsecond clamp portions having a receiving section disposed substantiallyperpendicular to a longitudinal axis of the solar panel clamp, thereceiving section having at least one fastener hole to facilitateconnecting said clamp to a solar panel grid.
 13. The solar panel clampof claim 8, wherein the fastener comprises first and second fastenerspositioned with respect to the first and second clamp portions betweenthe plurality of first projections and the plurality of secondprojections.
 14. The solar panel clamp of claim 13, wherein the firstfastener is positioned between a first one of the plurality of firstprojections and a first one of the plurality of second projections, andthe second fastener is positioned between a second one of the pluralityof first projections and a second one of the plurality of secondprojections.
 15. A clamp, comprising: first and second opposing clampportions engageable with each other adjacent first and second ends; anda fastener engageable with the first and second clamp portions; theclamp having a loosened configuration in which the first and secondclamp portions are connected adjacent the first end and are separated bya distance at the second end; the clamp having a tightened configurationin which, at the second end, the first and second clamp portions arepositioned closer to each other than the first distance; the first andsecond clamp portions having a corresponding plurality projections andrecesses disposed at the second end for deforming a captured portion ofa roof seam as the clamp is moved from the loosened configuration to thetightened configuration.
 16. The clamp of claim 15, comprising a springdisposed between the first and second clamp portions to bias the clampportions apart.
 17. The clamp of claim 16, the spring disposed about abody portion of the fastener.
 18. The clamp of claim 15, wherein theprojections are rounded.
 19. The clamp of claim 15, one of the first andsecond clamp portions having a receiving section associated with thefirst end thereof, the receiving section disposed substantiallyperpendicular to a longitudinal axis of the clamp, the receiving sectionhaving at least one fastener hole.
 20. The clamp of claim 19, whereinthe receiving section is integral to the first clamp portion.